Inner globe for inclosed-arc lamps.



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INNER GLOBE FOR INCLOSED ARQ LAMPS.

(Application led Nov. 10, 1900.)

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Vmilllll l' WITNESSE-S:

524 ATTQRNEY me Nnnms arms cn. sHoToLn'Hm wnsummcu4 u c.

UNrTnp STATES .errent JAMES P. WILLIAMS, OF NEW YORK, N. Y., ASSIGNOR TO H. IIOWARD DOUGLAS, OF SAME PLACE.

INNER GLOBE FOR INCLOSEDHARC LAMPS.

SPECIFICATION forming* part 0f LettlS Patent NO. 684,534, dated October 15, 1901.

Application filed November 10| 1900. Serial No. 36,025. (No model.)

T0 @ZZ whom, t may concern:

Be it known that I, JAMns P. WrLLrAMs, a citizen of the United States, residing in the borough of Manhattan, in the city, county, and State of New York, have invented certain new and useful Improvements in Inner Globes for Inclosed-Arc Lamps, of which the following is a specification.

My invention is in the nature of an inner globe for an electric-arc lamp of the class in which the aro is inclosed in an outer and an inner globe; and the invention has for its ob ject to provide an inner globe for lamps of this class which shall contain a supplemental gaschamber above the are and entirely within the globe, thereby simplifying and cheapening the construction of the lamp without in any wise impairing its efficiency.

With this object in View the invent-ion consists in an inner globe, the construction, arrangement, and combination of the part-s of which will be fully described hereinafter, and its specific .points of novelty pointed out in the appended claims.

In the accompanying drawings, Figure l represents a vertical sectional view of an inclosed-arc lamp provided with an inner globe constructed in accordance with my invention. Fig. 2 represents a perspective view of the inner globe detached. Fig. 3 represents a perspective view of the inner partition of the globe detached and inverted. Fig. 4 represents a vertical sectional view of the cover for the inner globe detached.

Like letters of reference indicate the same parts in all of the iigures.

In arc-lamps of the class specifiede-ethat is to say, wherein the arc is inclosed in an inner globe in which a partial vacuum has been created-Mit has been found necessary to provide an inclosed gaschamber above the arc, and this gas-chamber has been always located either wholly or partially in the parts oi the lamp above the inner globeA In either case it has been necessary to make those parts of the lamp which wholly or partially inclose the gas-chamber of a large number of comparatively expensive parts liable to get out of order easily and to thus incur expense in repairing or replacing. i

In the present invention 'li forni the gas chamber Wholly in the inner globe, which is indicated in the drawings by the letter E, the ordinary carbone being indicated by the letters B and O, the carbons being supported in any approved manner and provided with any suitable feeding mechanism.

D indicates the support for the inner globe E, in which the arc is found at F.

G indicates the usual outer globe surrounding the inner globe E and supported by any usual means. The inner globe E is of the usual construction, except that it is inwardly grooved around its periphery on a horizontal plane above the arc F, thus forming an inner annular flange H, upon which rests a removable partition I, provided with a central hole J, throughwhich to pass the upper carbon B. The inner globe is also provided with a cover K, having a central hole L, also for the pur-y poseof permitting of the passage of the upper carbon. An upper gas-chamber M is thus formed wholly within the inner globe E and between the partition I and the cover K, which answers all of the purposes of the gaschanlbers heretofore formed wholly or partially without the inner globe.

The simplicity and economy of my inven tion will at once be obvious to those skilled in the art, and it will be further obvious that the partition and cover may be varied in construction without departing from the spirit of the invention.

As an example f a suitable construction of partition I have illustrated it as having its periphery chambered off to cause it to prop-` erly seat itself on the inner annular' iiange H and the cover K as having its edge rabbeted to properly fit into and upon the upper edge of globe E. A

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. An inner globe for an inclosed-arc electric lamp provided with an inner annular iiange in a horizontal plane above the arc, a horizontal partition resting upon said flange, and a top cover, thereby forming an upper gaschamber wholly Within the globe and above the are, substantially as described.

2. An inner globe for an inclosed-arc electric lamp inwardly grooved in itsouter pcn ripheryforming an innei annnlar flange in a horizontal plane above the are, and provided With a horizontal partition resting upon said ange,and with a top cover,whereby is formed 5 a supplementary gas-chamber Wholly Within the globe and above the are, substantially as described.

Witness my han,tl1s l1st day of Novembei", 1900, in the presence of two subscribing Wit- HQSSGS.

JAMES P. WILLIAMS. Witnesses:

HERMAN MEYER, MABEL K. WHITMAN. 

